Given a certain class in my Tbox a string value

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1

Hi,

So this is more a principle question within the semantic web and RDF definition.

I have some classes in my graph for whom I would like to attach a certain string value with some predicate.

So for instance a wall is defined as a class ifcowl:IfcWall. To this wall I would like to say has a classification-code “AD” with predicate ccs:productID. Now if I then have a instance of this class it should automatically infer that the instance also has ccs:productID “AD” - what would be the right way to this? :slight_smile:

2

Arbaz,

This is a textbook case where Stardog Rules will give you exactly what you want. If you add the rule:

IF {
 ?wall a ifcowl:IfcWall
}
THEN {
 ?wall ccs:productID "AD"
}

and run a query with reasoning enabled, your ccs:productID values will appear when queried.

3

Yes thanks stephen, but this is the solution I am using right now.

I was wondering if it possible to create an ontology that could handle this? For sharing with other semantic web tools other than Stardog?

4

I'm a little confused by "I have some classes in my graph for whom I would like to attach a certain string value with some predicate.". I think what you may have meant was, "I have an instance of some class for whom I would like to attach a certain string value with some predicate". If that's the case then you're probably looking for owl:hasValue

5

Let me clarify.

The class ifcowl:IfcWall is a class of a physical wall which in the real world has a classification code “AD” meaning that all instances of such a class has a ccs:productID “AD”. I know this can be reasoned to via rulesets, but is there a way to do this in the ontology?

6

You can export Stardog rules in SWRL syntax and can load that to other tools like Protege. But you can express this specific rule in OWL using owl:hasValue as Zachary mentioned.

Best,
Evren

7

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